Cergy-Pontoise
September
Weather in Cergy-Pontoise for September 2025
Your guide to Cergy-Pontoise weather in September - trends and predictions
In general, the average temperature in Cergy-Pontoise at the beginning of September is 27.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.6 °C by the end of September.
The climate of Cergy-Pontoise in September is notably wet, with an average of 13 rainy days.
Is September a good time to visit Cergy-Pontoise? check out the best time to travel to Cergy-Pontoise page.
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Temperatures
Rain 🌧️
More
17
Dry days
13
Rainy days
0
Snow days
23°/14°
Temperatures
17 km/h
Avg max wind
65 %
Avg humidity
Cergy-Pontoise in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2 26° | 3  27° | 4 26° | 5  26° | 6 28° | 7 30° |
| 8 26° | 9 25° | 10 26° | 11 21° | 12  18° | 13 19° | 14  21° |
| 15 24° | 16 24° | 17 25° | 18 25° | 19 23° | 20 24° | 21 21° |
| 22  19° | 23 19° | 24 19° | 25 19° | 26 22° | 27 21° | 28 19° |
| 29 18° | 30 19° |
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Temperatures trend during September in Cergy-Pontoise
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 27° /18° | 4 mm | 7 | |
| 2 Sept. | Light rain shower | 26° /17° | 0.7 mm | 6 | |
| 3 Sept. | Sunny | 27° /17° | 0.4 mm | 7 | |
| 4 Sept. | Sunny | 26° /16° | 0 mm | 7 | |
| 5 Sept. | Partly cloudy | 26° /16° | 7.5 mm | 6 | |
| 6 Sept. | Sunny | 28° /17° | 0.1 mm | 7 | |
| 7 Sept. | Sunny | 30° /17° | 2.4 mm | 7 | |
| 8 Sept. | Sunny | 26° /18° | 8.5 mm | 6 | |
| 9 Sept. | Sunny | 25° /18° | 0.4 mm | 6 | |
| 10 Sept. | Partly cloudy | 26° /17° | 0.2 mm | 6 | |
| 11 Sept. | Patchy rain possible | 21° /15° | 1.6 mm | 5 | |
| 12 Sept. | Overcast | 18° /12° | 0.3 mm | 5 | |
| 13 Sept. | Overcast | 19° /11° | 0.3 mm | 5 | |
| 14 Sept. | Cloudy | 21° /12° | 0 mm | 5 | |
| 15 Sept. | Partly cloudy | 24° /12° | 0 mm | 7 | |
| 16 Sept. | Partly cloudy | 24° /14° | 0.1 mm | 6 | |
| 17 Sept. | Partly cloudy | 25° /14° | 0.1 mm | 6 | |
| 18 Sept. | Partly cloudy | 25° /15° | 0.4 mm | 7 | |
| 19 Sept. | Overcast | 23° /13° | 0 mm | 6 | |
| 20 Sept. | Patchy rain possible | 24° /14° | 1.4 mm | 5 | |
| 21 Sept. | Light rain shower | 21° /14° | 14.1 mm | 5 | |
| 22 Sept. | Light drizzle | 19° /13° | 9.3 mm | 4 | |
| 23 Sept. | Patchy rain possible | 19° /11° | 2.2 mm | 5 | |
| 24 Sept. | Sunny | 19° /12° | 4.5 mm | 5 | |
| 25 Sept. | Partly cloudy | 19° /12° | 10.3 mm | 5 | |
| 26 Sept. | Sunny | 22° /14° | 3.3 mm | 5 | |
| 27 Sept. | Partly cloudy | 21° /13° | 1.2 mm | 6 | |
| 28 Sept. | Partly cloudy | 19° /10° | 0 mm | 5 | |
| 29 Sept. | Patchy rain possible | 18° /10° | 0.2 mm | 4 | |
| 30 Sept. | Sunny | 19° /11° | 0.3 mm | 5 | |
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Important Notice
Our weather forecast for Cergy-Pontoise in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Cergy-Pontoise forecast closer to your planned date for the most up-to-date weather information.
Cergy-Pontoise in September - FAQ
What are the expected maximum and minimum temperatures in Cergy-Pontoise during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cergy-Pontoise during September?
Moderate rainfall is anticipated in Cergy-Pontoise during September, with a total of 73.62 mm spread over approximately 13 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Cergy-Pontoise during September?
The average wind speed in Cergy-Pontoise during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Cergy-Pontoise in September?
As you prepare for your trip to Cergy-Pontoise in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Cergy-Pontoise, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Cergy-Pontoise
Explore the daily rainfall trends and prepare for Cergy-Pontoises September weather 💧
UV exposure in Cergy-Pontoise during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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